Date: Thu, 26 Oct 2000 23:50:06 -0700 (PDT) From: Bruce Evans <bde@zeta.org.au> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/22099: Xircom CreditCard CM-56T Modem keeps giving interrupt-level buffer overflows. Message-ID: <200010270650.XAA68498@freefall.freebsd.org>
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The following reply was made to PR kern/22099; it has been noted by GNATS. From: Bruce Evans <bde@zeta.org.au> To: kienow@infinet.com Cc: freebsd-gnats-submit@FreeBSD.ORG Subject: Re: kern/22099: Xircom CreditCard CM-56T Modem keeps giving interrupt-level buffer overflows. Date: Fri, 27 Oct 2000 17:42:25 +1100 (EST) On Wed, 18 Oct 2000 kienow@infinet.com wrote: > >Description: > Whenever I place a heavy network load on my modem I get the following > messages over and over. Why does this happen? and how can it be fixed? > Also, what are the results of these messages? Am I not getting the > best speed on my connection as I should? > > sio3: 88 more interrupt-level buffer overflows (total 88) > sio3: 50 more interrupt-level buffer overflows (total 138) This might be caused by the modem not emulating a UART properly. If it has a too-large buffer, then it might flood the driver buffers. Try enabling RTS/CTS flow control if it isn't already. Try increasing cp4ticks in the driver. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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